Message-ID: <CAN_1RdsFh5-xZ7ijL-Cwf4cDzWYthFfMOM7dPdRUub2rQ_RMDw@mail.gmail.com>
Date:	Tue, 7 Aug 2012 11:04:10 +0800
From:	Peiyong Feng <peiyong.feng.kernel@...il.com>
To:	Lukasz Majewski <l.majewski@...sung.com>
Cc:	balbi@...com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [BUG] Kernel panic when try s3c-hsotg.c with kernel 3.5

2012/8/6 Lukasz Majewski <l.majewski@...sung.com>:
> Hi,
>
>> Hi,
>>
>> On Mon, Aug 06, 2012 at 06:12:05PM +0800, Peiyong Feng wrote:
>> > I got a kernel panic when try hsotg of ok6410 which is based on
>> > s3c6410:
> As you said, you are using the ok6410. And it is "based" on the s3c6410
> CPU. S3C6410 is a single core CPU. I assume that ok6410 is also single
> core?
yes
>
>> >
>> >
>> > cdc_acm: USB Abstract Control Model driver for USB modems and ISDN
>> > adapters Unable to handle kernel NULL pointer dereference at
>> > virtual address 00000100
>
>> > pgd = c0004000
>> > [00000100] *pgd=00000000
>> > Internal error: Oops: 5 [#1] ARM
>> > Modules linked in:
>> > CPU: 0    Not tainted  (3.5.0 #9)
>> > PC is at s3c_hsotg_handle_outdone+0x44/0x158
>> > LR is at s3c_hsotg_irq+0x75c/0x804
>> > pc : [<c023e7fc>]    lr : [<c024061c>]    psr: 60000193
>> > sp : c782fd20  ip : 00000029  fp : c13a1460
>> > r10: 00000000  r9 : 00000008  r8 : 000000d0
>> > r7 : c13a1400  r6 : 00000002  r5 : 00000000  r4 : 00060002
>> > r3 : 000000d0  r2 : 00000000  r1 : 00080200  r0 : c13a1400
>> > Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
>> > Control: 00c5387d  Table: 50004008  DAC: 00000017
>> > Process swapper (pid: 1, stack limit = 0xc782e268)
>> > Stack: (0xc782fd20 to 0xc7830000)
>> > fd20: c13a1460 c0200f64 00000000 00060002 00000000 00000002
>> > c13a1400 00000010 fd40: 00000000 c024061c 00060002 00000000
>> > 00000002 00000008 c782fda0 c139a5c0 fd60: c139a5c0 00000000
>> > 00000000 0000005a c04cc52c c04cc594 c04ea5fe c00565c0 fd80:
>> > 00000000 00000000 00000000 c04cc52c c139a5c0 c04cc57c 00000000
>> > c04eb328 fda0: c04cc55c c04eb324 c04c44c0 c0056768 c04cc52c
>> > c04cc57c 00000000 c0058d64 fdc0: 0000005a c04d7dd8 00000000
>> > c005617c 0000005a c000efbc c04eb350 00000001 fde0: c782fe08
>> > c000853c c036c540 60000013 ffffffff c782fe3c c04cc57c c04cc55c
>> > fe00: 60000013 c000dd80 c04cc57c c782c000 ffffffff 00000001
>> > 60000013 c04cc52c fe20: c139a5c0 0000005a c04cc57c c04cc55c
>> > 60000013 c04c44c0 f6010000 c782fe50 fe40: c036c53c c036c540
>> > 60000013 ffffffff c023fec0 c00574c8 00000000 c008b2dc fe60:
>> > c023fec0 00000000 00000000 c13a1400 0000005a c139a5c0 c04cc52c
>> > c0057960 fe80: 0000005a c13a1400 c04c44b8 00000000 c051d238
>> > c049b0ec 00000000 c03688fc fea0: c7853e60 c13a1400 c7804f80
>> > 00000000 c04c44f4 60000013 c7855a80 00000000 fec0: c04e1bb4
>> > c04c44c0 c04c44c0 c04e1bb4 c04e1bb4 c051d238 c049b0ec 00000000
>> > fee0: c04eb040 c020588c c04c44c0 c0204524 c04c44c0 c04c44f4
>> > c04e1bb4 c02046ac ff00: c13a01e0 c0204738 00000000 c782ff18
>> > c04e1bb4 c0202e30 c7803878 c7823700 ff20: c04dd1d0 c040b8d4
>> > c04e1bb4 c04e1bb4 c04dd1d0 c0203600 c040b8d4 c01b8568 ff40:
>> > 00000000 00000000 c04e1bb4 00000007 c04eb040 c782e000 c04a65e0
>> > c0204ce8 ff60: 00000000 c04a65d4 00000007 c04eb040 c782e000
>> > c0008628 c04c7ea0 00000000 ff80: 0000009c 00000000 c0625cf9
>> > c0037178 00000006 00000006 c0461b84 c042cee8 ffa0: c04c7ea0
>> > c04abdd4 c04a65d4 00000007 c04eb040 0000009c c04841b0 c04a65e0
>> > ffc0: 00000000 c048430c 00000006 00000006 c04841b0 00000000
>> > 00000000 c048421c ffe0: c000f08c 00000013 00000000 00000000
>> > 00000000 c000f08c 00000000 00000000 [<c023e7fc>]
>> > (s3c_hsotg_handle_outdone+0x44/0x158) from [<c024061c>]
>> > (s3c_hsotg_irq+0x75c/0x804) [<c024061c>]
>> > (s3c_hsotg_irq+0x75c/0x804) from [<c00565c0>]
>> > (handle_irq_event_percpu+0x50/0x1bc) [<c00565c0>]
>> > (handle_irq_event_percpu+0x50/0x1bc) from [<c0056768>]
>> > (handle_irq_event+0x3c/0x5c) [<c0056768>]
>> > (handle_irq_event+0x3c/0x5c) from [<c0058d64>]
>> > (handle_level_irq+0x8c/0x118) [<c0058d64>]
>> > (handle_level_irq+0x8c/0x118) from [<c005617c>]
>> > (generic_handle_irq+0x38/0x44) [<c005617c>]
>> > (generic_handle_irq+0x38/0x44) from [<c000efbc>]
>> > (handle_IRQ+0x30/0x84) [<c000efbc>] (handle_IRQ+0x30/0x84) from
>> > [<c000853c>] (vic_handle_irq+0x68/0xa8) [<c000853c>]
>> > (vic_handle_irq+0x68/0xa8) from [<c000dd80>] (__irq_svc+0x40/0x60)
>> > Exception stack(0xc782fe08 to 0xc782fe50) fe00:
>> > c04cc57c c782c000 ffffffff 00000001 60000013 c04cc52c fe20:
>> > c139a5c0 0000005a c04cc57c c04cc55c 60000013 c04c44c0 f6010000
>> > c782fe50 fe40: c036c53c c036c540 60000013 ffffffff [<c000dd80>]
>> > (__irq_svc+0x40/0x60) from [<c036c540>]
>> > (_raw_spin_unlock_irqrestore+0x10/0x14) [<c036c540>]
>> > (_raw_spin_unlock_irqrestore+0x10/0x14) from [<c00574c8>]
>> > (__setup_irq+0x178/0x3f8) [<c00574c8>] (__setup_irq+0x178/0x3f8)
>> > from [<c0057960>] (request_threaded_irq+0xc4/0x12c) [<c0057960>]
>> > (request_threaded_irq+0xc4/0x12c) from [<c03688fc>]
>> > (s3c_hsotg_probe+0x14c/0x700) [<c03688fc>]
>> > (s3c_hsotg_probe+0x14c/0x700) from [<c020588c>]
>> > (platform_drv_probe+0x18/0x1c) [<c020588c>]
>> > (platform_drv_probe+0x18/0x1c) from [<c0204524>]
>> > (driver_probe_device+0x78/0x200) [<c0204524>]
>> > (driver_probe_device+0x78/0x200) from [<c0204738>]
>> > (__driver_attach+0x8c/0x90) [<c0204738>]
>> > (__driver_attach+0x8c/0x90) from [<c0202e30>]
>> > (bus_for_each_dev+0x60/0x8c) [<c0202e30>]
>> > (bus_for_each_dev+0x60/0x8c) from [<c0203600>]
>> > (bus_add_driver+0xac/0x250) [<c0203600>]
>> > (bus_add_driver+0xac/0x250) from [<c0204ce8>]
>> > (driver_register+0x58/0x130) [<c0204ce8>]
>> > (driver_register+0x58/0x130) from [<c0008628>]
>> > (do_one_initcall+0x34/0x17c) [<c0008628>]
>> > (do_one_initcall+0x34/0x17c) from [<c048430c>]
>> > (kernel_init+0xf0/0x1bc) [<c048430c>] (kernel_init+0xf0/0x1bc) from
>> > [<c000f08c>] (kernel_thread_exit+0x0/0x8) Code: e0433106 e0833006
>> > e1a03183 e0828003 (e5984030) ---[ end trace 2ea4e574318ecf99 ]---
>> > Kernel panic - not syncing: Fatal exception in interrupt
>> > -----------------------------------------------------------------------------------
>> >
>> >
>> > When I try locate the source using arm-linux-gdb, I got this:
>> > -------------------------------------------------------------
>> > GNU gdb (Sourcery G++ Lite 2008q3-72) 6.8.50.20080821-cvs
>> > Copyright (C) 2008 Free Software Foundation, Inc.
>> > License GPLv3+: GNU GPL version 3 or later
>> > <http://gnu.org/licenses/gpl.html> This is free software: you are
>> > free to change and redistribute it. There is NO WARRANTY, to the
>> > extent permitted by law.  Type "show copying" and "show warranty"
>> > for details. This GDB was configured as "--host=i686-pc-linux-gnu
>> > --target=arm-none-linux-gnueabi".
>> > For bug reporting instructions, please see:
>> > <https://support.codesourcery.com/GNUToolchain/>...
>> > (gdb) l *(s3c_hsotg_handle_outdone+0x44)
>> > 0xc023e7fc is in s3c_hsotg_handle_outdone
>> > (drivers/usb/gadget/s3c-hsotg.c:1553). 1548 static void
>> > s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg,
>> > 1549                                             int epnum, bool
>> > was_setup) 1550     { 1551          u32 epsize =
>> > readl(hsotg->regs + DOEPTSIZ(epnum)); 1552          struct
>> > s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum]; 1553
>> > struct s3c_hsotg_req *hs_req = hs_ep->req; 1554
>> > struct usb_request *req = &hs_req->req; 1555
>> > unsigned size_left = DxEPTSIZ_XferSize_GET(epsize);
>> > 1556                int result = 0; 1557
>> > (gdb)
>> >
>> >
>> >
>> > I also try the old linux like 2.6.36, I works fine.
>>
>> Lukasz, any ideas ?
>>
>
> I see, that you are using 3.5.0 kernel.
> During the 3.5 kernel development cycle, I've discovered very nasty SMP
> related bug. It is fixed at 3.6-rc1 code.
>
> Relevant commits are:
> 22258f4 usb: hsotg: samsung: Replace endpoint specific locks with a
> global lock
> 2b19a52 usb: hsotg: samsung: Protect the udc_stop routine with spinlock
> 5ad1d31 usb: hsotg: samsung: smp Provide *_lock functions abstraction
> layer for SMP SoCs
>
> Above commits are already available at 3.6-rc1.
>
> Would it be possible to cross compile 3.6-rc1 kernel for your platform
> and test the USB?
>
>
>
> I'd like to ask you for #define DEBUG above includes (to enable
> dev_dbg()) calls at ./drivers/usb/gadget/s3c-hsotg.c file.
>
> Afterwards please, paste the log (dmesg) from booting your target
> device.
Still canot work, log:
Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0
Linux version 3.6.0-rc1-00133-g42a579a-dirty (root@...x) (gcc version
4.3.2 (Sourcery G++ Lite 2008q3-72) ) 2
CPU: ARMv6-compatible processor [410fb766] revision 6 (ARMv7), cr=00c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
Machine: SMDK6410
Memory policy: ECC disabled, Data cache writeback
CPU S3C6410 (id 0x36410101)
S3C24XX Clocks, Copyright 2004 Simtec Electronics
camera: no parent clock specified
S3C64XX: PLL settings, A=532000000, M=532000000, E=24000000
S3C64XX: HCLK2=266000000, HCLK=133000000, PCLK=66500000
mout_apll: source is fout_apll (1), rate is 532000000
mout_epll: source is epll (1), rate is 24000000
mout_mpll: source is mpll (1), rate is 532000000
usb-bus-host: source is clk_48m (0), rate is 48000000
audio-bus: source is mout_epll (0), rate is 24000000
audio-bus: source is mout_epll (0), rate is 24000000
audio-bus: source is mout_epll (0), rate is 24000000
irda-bus: source is mout_epll (0), rate is 24000000
camera: no parent clock specified
CPU: found DTCM0 8k @ 00000000, not enabled
CPU: moved DTCM0 8k to fffe8000, enabled
CPU: found DTCM1 8k @ 00000000, not enabled
CPU: moved DTCM1 8k to fffea000, enabled
CPU: found ITCM0 8k @ 00000000, not enabled
CPU: moved ITCM0 8k to fffe0000, enabled
CPU: found ITCM1 8k @ 00000000, not enabled
CPU: moved ITCM1 8k to fffe2000, enabled
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 32512
Kernel command line: console=ttySAC0,115200 root=/dev/ram
init=/linuxrc initrd=0x51000000,6M ramdisk_size=6144
PID hash table entries: 512 (order: -1, 2048 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 128MB = 128MB total
Memory: 120316k/120316k available, 10756k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    DTCM    : 0xfffe8000 - 0xfffec000   (  16 kB)
    ITCM    : 0xfffe0000 - 0xfffe4000   (  16 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    vmalloc : 0xc8800000 - 0xff000000   ( 872 MB)
    lowmem  : 0xc0000000 - 0xc8000000   ( 128 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .text : 0xc0008000 - 0xc02d7a64   (2879 kB)
      .init : 0xc02d8000 - 0xc02f662c   ( 122 kB)
      .data : 0xc02f8000 - 0xc0326420   ( 186 kB)
       .bss : 0xc0327024 - 0xc0358858   ( 199 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:246
VIC @f6000000: id 0x00041192, vendor 0x41
VIC @f6010000: id 0x00041192, vendor 0x41
sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 4294967286ms
Console: colour dummy device 80x30
Calibrating delay loop... 353.89 BogoMIPS (lpj=1769472)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
Setting up static identity map for 0x5021c868 - 0x5021c8c4
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
s3c64xx_dma_init: Registering DMA channels
PL080: IRQ 73, at c8846000, channels 0..8
PL080: IRQ 74, at c8848000, channels 8..16
S3C6410: Initialising architecture
bio: create slab <bio-0> at 0
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
s3c-i2c s3c2440-i2c.0: slave address 0x10
s3c-i2c s3c2440-i2c.0: bus frequency set to 64 KHz
s3c-i2c s3c2440-i2c.0: i2c-0: S3C I2C adapter
s3c-i2c s3c2440-i2c.1: slave address 0x10
s3c-i2c s3c2440-i2c.1: bus frequency set to 64 KHz
s3c-i2c s3c2440-i2c.1: i2c-1: S3C I2C adapter
Trying to unpack rootfs image as initramfs...
rootfs image is not initramfs (junk in compressed archive); looks like an initrd
Freeing initrd memory: 6144K
ROMFS MTD (C) 2007 Red Hat, Inc.
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
start plist test
end plist test
s3c-fb s3c-fb: window 0: fb
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
s3c6400-uart.0: ttySAC0 at MMIO 0x7f005000 (irq = 69) is a S3C6400/10
console [ttySAC0] enabled
s3c6400-uart.1: ttySAC1 at MMIO 0x7f005400 (irq = 70) is a S3C6400/10
s3c6400-uart.2: ttySAC2 at MMIO 0x7f005800 (irq = 71) is a S3C6400/10
s3c6400-uart.3: ttySAC3 at MMIO 0x7f005c00 (irq = 72) is a S3C6400/10
brd: module loaded
loop: module loaded
at24 0-0050: 1024 byte 24c08 EEPROM, writable, 1 bytes/write
at24 1-0057: 16384 byte 24c128 EEPROM, writable, 1 bytes/write
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
s3c2410-ohci s3c2410-ohci: irq 79, io mem 0x74300000
usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: S3C24XX OHCI
usb usb1: Manufacturer: Linux 3.6.0-rc1-00133-g42a579a-dirty ohci_hcd
usb usb1: SerialNumber: s3c24xx
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
Unable to handle kernel NULL pointer dereference at virtual address 000000e0
pgd = c0004000
[000000e0] *pgd=00000000
Internal error: Oops: 5 [#1] ARM
Modules linked in:
CPU: 0    Not tainted  (3.6.0-rc1-00133-g42a579a-dirty #19)
PC is at s3c_hsotg_handle_outdone+0x40/0xdc
LR is at s3c_hsotg_irq+0x5a0/0x5fc
pc : [<c01a3408>]    lr : [<c01a4eb8>]    psr: 80000193
sp : c782fd18  ip : 00000000  fp : c139301c
r10: 00000000  r9 : 00000008  r8 : 00000000
r7 : c1393010  r6 : 000000b0  r5 : 00000002  r4 : c1392300
r3 : 000000b0  r2 : 00000000  r1 : 00080200  r0 : c1393010
Flags: Nzcv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 00c5387d  Table: 50004008  DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc782e268)
Stack: (0xc782fd18 to 0xc7830000)
fd00:                                                       c1392300 c1392300
fd20: 00000000 c1393010 00000010 c01a4eb8 c782fd84 c1393078 000012d0 c1392300
fd40: c1392300 00000000 00000000 0000005a c0310aec c0310b54 c03263c1 c0056e44
fd60: c0325c8c 00000000 22222222 c0310aec c1392300 c0310b3c 00000000 c0327328
fd80: c0310b1c c0327324 c0327040 c0056fe4 c0310aec c0310b3c 00000000 c00595e8
fda0: 0000005a c0318d68 00000000 c0056a00 0000005a c000efdc c0327350 00000001
fdc0: c782fde8 c0008508 c021c7c0 60000013 ffffffff c782fe1c c0310b3c c0310b1c
fde0: 60000013 c000dd80 c0310b3c c782c000 ffffffff 00000001 60000013 c0310aec
fe00: c1392300 0000005a c0310b3c c0310b1c 60000013 c0327040 f6010000 c782fe30
fe20: c021c7bc c021c7c0 60000013 ffffffff c01a4918 c0057d48 c138bc90 c008c344
fe40: c01a4918 00000000 00000000 c1393010 0000005a c1392300 c0310aec c00581e4
fe60: c138bcd0 00000000 c01a4918 0000005a c1393010 c02ede10 c0308998 c0059e00
fe80: c784fe60 c1393010 c784fe60 0000005a c1393010 c0308990 c03229e8 c0308998
fea0: c02f1818 c0218c7c 00000000 c784fe60 c1393010 00000000 c03089cc 60000013
fec0: c7851940 00000000 c03229e8 c0308998 c0308998 c03229e8 c03229e8 c0357938
fee0: c02ede10 c02f1818 c0327040 c016ba7c c0308998 c016a6f0 c0308998 c03089cc
ff00: c03229e8 c016a880 c782e000 c016a90c 00000000 c782ff20 c03229e8 c0168fe8
ff20: c7803878 c7823ac0 c031e0c8 c02875cc c138c480 c03229e8 c031e0c8 c01697b8
ff40: c02875cc c03229e8 00000007 00000000 c03229e8 00000007 c0327040 c016aebc
ff60: 00000000 c02f180c 00000007 c0327040 c782e000 c00085f0 c030c378 00000000
ff80: 00000053 00000000 c0459cf9 c00377dc 00000006 00000006 c02c1380 c02a0130
ffa0: c030c378 c02f6380 c02f180c 00000007 c0327040 00000053 c02d81b0 c02f1818
ffc0: 00000000 c02d830c 00000006 00000006 c02d81b0 00000000 00000000 c02d821c
ffe0: c000f0ac 00000013 00000000 00000000 00000000 c000f0ac 0002fbf7 00007fff
[<c01a3408>] (s3c_hsotg_handle_outdone+0x40/0xdc) from [<c01a4eb8>]
(s3c_hsotg_irq+0x5a0/0x5fc)
[<c01a4eb8>] (s3c_hsotg_irq+0x5a0/0x5fc) from [<c0056e44>]
(handle_irq_event_percpu+0x50/0x1b4)
[<c0056e44>] (handle_irq_event_percpu+0x50/0x1b4) from [<c0056fe4>]
(handle_irq_event+0x3c/0x5c)
[<c0056fe4>] (handle_irq_event+0x3c/0x5c) from [<c00595e8>]
(handle_level_irq+0x8c/0x118)
[<c00595e8>] (handle_level_irq+0x8c/0x118) from [<c0056a00>]
(generic_handle_irq+0x38/0x44)
[<c0056a00>] (generic_handle_irq+0x38/0x44) from [<c000efdc>]
(handle_IRQ+0x30/0x84)
[<c000efdc>] (handle_IRQ+0x30/0x84) from [<c0008508>] (vic_handle_irq+0x68/0xa8)
[<c0008508>] (vic_handle_irq+0x68/0xa8) from [<c000dd80>] (__irq_svc+0x40/0x54)
Exception stack(0xc782fde8 to 0xc782fe30)
fde0:                   c0310b3c c782c000 ffffffff 00000001 60000013 c0310aec
fe00: c1392300 0000005a c0310b3c c0310b1c 60000013 c0327040 f6010000 c782fe30
fe20: c021c7bc c021c7c0 60000013 ffffffff
[<c000dd80>] (__irq_svc+0x40/0x54) from [<c021c7c0>]
(_raw_spin_unlock_irqrestore+0x10/0x14)
[<c021c7c0>] (_raw_spin_unlock_irqrestore+0x10/0x14) from [<c0057d48>]
(__setup_irq+0x184/0x408)
[<c0057d48>] (__setup_irq+0x184/0x408) from [<c00581e4>]
(request_threaded_irq+0xc4/0x12c)
[<c00581e4>] (request_threaded_irq+0xc4/0x12c) from [<c0059e00>]
(devm_request_threaded_irq+0x58/0x8c)
[<c0059e00>] (devm_request_threaded_irq+0x58/0x8c) from [<c0218c7c>]
(s3c_hsotg_probe+0xdc/0x5c0)
[<c0218c7c>] (s3c_hsotg_probe+0xdc/0x5c0) from [<c016ba7c>]
(platform_drv_probe+0x18/0x1c)
[<c016ba7c>] (platform_drv_probe+0x18/0x1c) from [<c016a6f0>]
(driver_probe_device+0x78/0x208)
[<c016a6f0>] (driver_probe_device+0x78/0x208) from [<c016a90c>]
(__driver_attach+0x8c/0x90)
[<c016a90c>] (__driver_attach+0x8c/0x90) from [<c0168fe8>]
(bus_for_each_dev+0x60/0x8c)
[<c0168fe8>] (bus_for_each_dev+0x60/0x8c) from [<c01697b8>]
(bus_add_driver+0xac/0x248)
[<c01697b8>] (bus_add_driver+0xac/0x248) from [<c016aebc>]
(driver_register+0x58/0x14c)
[<c016aebc>] (driver_register+0x58/0x14c) from [<c00085f0>]
(do_one_initcall+0x34/0x17c)
[<c00085f0>] (do_one_initcall+0x34/0x17c) from [<c02d830c>]
(kernel_init+0xf0/0x1bc)
[<c02d830c>] (kernel_init+0xf0/0x1bc) from [<c000f0ac>]
(kernel_thread_exit+0x0/0x8)
Code: e0433105 e0653003 e1a03183 e0826003 (e5964030)
---[ end trace 91f15b573a676870 ]---
Kernel panic - not syncing: Fatal exception in interrupt

>
> Thanks in advance.
>
> --
> Best regards,
>
> Lukasz Majewski
>
> Samsung Poland R&D Center | Linux Platform Group
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